Looper-operating mechanism for sewing-machines.



L. ONDERDONK.

LOOPBR OPERATING MECHANISM FOR SEWING MACHINES. APYLIOATION FILED SEPT. 10,-1901.

1,129,593. Patented Feb. 23, 1915.

3 SHEETSSHEET 1.

Snow Won L. ONDERDONK. LOOPER OPERATING MECHANISM FOR SEWING MACHINES.

APPLIOATION FILED SEPT. 10,1907.

1,129,593. PatentedFeb. 23, 1915.

HBETS-SHEET 2.

THE NORRIS PETERS 50., PHOTO-LITHOV. WASHINGWN, D. C.

'L; ONDERDONK.

LOOPEB. OPERATING MEOHANTQM FOR SEWING MAGHINES.

' APPLICATION FILED SEPT. 10,1907.

1,129,593; Patented Feb. 23, 1915.

' 3 H r. a.

IITD STATS @FFQ LANSING ONDERDONK, OF NEW YORK, N. Y., ASSIGNOR TO UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

LOOPER-OPERATING MECHANISM FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented Feb. 23, 1915.

Application filed September 10, 1907. Serial No. 392,212.

To all whom it may concern Be it known that I, LANSING ONDERDONK, a citizen of the United States, residing at New York, in the county of New York, State of New York, have invented certain new and useful Improvements in Looper- Operating Mechanisms for Sewing-Machines, of which the following is a description, reference being had to the accompanying drawing and to the letters and figures of reference marked thereon.

My invention relates to new and useful improvements in looper operating mecha nisms for sewing machines, and has for its object to provide a looper-operating mechanism which shall move the looper quickly into the needle loop and give thereto a dwell at the forward end of its stroke.

A further object of my invention is to provide a looperoperating mechanism which shall move the looper across the path of the needle, whereby the looper thread loop is held spread for the entrance of the needle.

A still further object of my invention is to provide a looper-operating mechanism which shall consist of few parts, and shall be positive in its movements.

Still further objects will in part be obvious, and in part be hereinafter more fully set forth.

In the drawings which show by way of illustration one embodiment of my invention,Figure 1 is a front view partly in section, with certain parts removed, of a sewing machine embodying my invention;

The work support 1 has rising therefrom a standard 2, carrying an overhangingarm, supportlng the needle head 3 at the forwa d.-

end thereof. The needle 4 is carried by a needle bar 5, which reciprocates in the needle head, and receives its movement from a crank disk 6, through a link 7.

The needle thread controller consists of an arm 8 mounted on a link 7, which reciprocates the needle bar, and said arm 8 carries at its outer end thread guides 9 and 10. The needle bar 5 is provided with a thread guide 11 at its upper end. Mounted at the upper end of the head of the machine on a bracket 12 is a thread-controlling lever 13, having a thread eye 14. Said thread-controlling lever is connected by a link 15 to a collar 16 on the presser bar 17. The presser bar carries a presser foot 18 at the lower end. Said presser bar is lifted by the lever 19.

The feed dog 20 is carried by a feed bar 21, which is pivoted at itsrear end to a rock shaft 22, mounted in bearings on the under side of the work support, and receiving an oscillating movement from an eccentric strap 23, which is connected to an eccentric on the main shaft mounted in the overhanging arm.

The feed bar is given its rising and falling movements from a rock shaft 24;, carrying a crank arm 25, which extends into a yoke 26, mounted on the end of the feed bar 21. Said rock shaft 241 is oscillated by a yoke 27, secured thereto at its rear end, and en gaging an eccentric on the shaft 28. The shaft 28 is connected to the rotary shaft, mounted in the overhanging arm by a belt or other suitable connection 29. Through this connection the shaft 28 is given a continuous rotation.

In the present embodiment of my invention, I have shown the needle bar 5 as provided with two needles, (see Figs. 2 and 3), and cooperating with said needles are two loopers 30 and 31. Said loopers 30 and 31 are mounted in a looper carrier 32, which is splined on a shaft 33. Said shaft 33 has one end thereof mounted in a bearing 34, at the forward end of the machine, and the other end of said shaft 33 passes through a bearing 35. The looper carrier 32 is yokeshaped, as shown in Fig. 3, and the arms 36 of the yoke of said looper carrier are secured to the shaft 33, so that the looper may slide longitudinally on said shaft, but

partakes of the oscillating movements given to the shaft 33.

Between the arms 36 of the looper carrier is arranged a collar 37, which is rigidly secured to the shaft 33. The looper carrier is providedwith latch 38 having a lip 39, which when the looper carrier is in the position shown in Fig. 3, engages behind the collar 37, and holds the looper carrier with one of its arms in engagement with said collar 37 When: it is desired to thread the looper, the latch 38 is lifted, drawing the lip 39 from behind the collar 37, and then said looper carrier may be slipped longitudinally of the shaft 33 to bring the loopers out from beneath the throat plate, whereby the same are rendered easily accessible for threading.

Asa means for .oscillating the looper-sup porting shaft 33, I ha ve provided an auxiliary shaftO, mounted in suitable bearings underneath the. work support. Said auxil:

iary shaft 40 is connected by means of a link 41, to a ball stud 42carried on a crank arm 4.3 secured to the forward end of the rotary shaft 28. The oppositeend of the auxiliary shaft 40. is provided with a crank arm 44:, carrying a ball stud 4:5,to which is connected a link 46. The link 46 in turn is connected to a ball stud 47,.secure d to a crank arm 48, rigidly mounted on the shaft33.

As the shaft 28 .is rotated,the auxiliary shaft 10 will be. oscillated as the length of the crank arm on said auxiliary shaft is greater than the length of the crank arm 4-3. As the auxiliary shaft is os cillated, the shaft 33 will also be oscillated through the linlg lti, The shaft 33 (see igs. 2- and 3), .extends through the bearing 35, and carriesa collar 49 .on. its outer end which is provided, with a ball stud 50.

The bearing 35 for the shaft33 is slotted as at 51, and mounted in said slotted hearing is an arm or link 52. Saidarmor link 52 is pivotally connected to the slotted bearing by a pivot pin 53. Saidv arm or link 52 engages the ball, stud 5O, carried by the collar 49 on the outer end of the shaft 33.

Asthe shaft 33 is oscillated, tl e collar/lfil, 1 together with the ball stud projecting therefrom, will also be oscillated. iThe oscillations of the ball stud 50 about the axis of the shaft 33 will move the arm 52 toward and from the under sideofthebed plate. As

; the outer end of the arm or. link 52 moves.

toward the under side ofthe bed-plate, .it will also move away from the bearing 35, and as it is connected-to thecollar 49 on the shaft 33, said shaft 33.will be moved long itudinally. .This longitudinal movement of the shaft 33 carries the loopers laterally, or cause the same to move in a v curved path.

he tim g 9f the p r s ssueh; haws. the

looper, the lateral movement of the looper continues, so that when the looperv reaches the forward end of its stroke, it has moved practically across the path of the needle. The looper, therefore, at the forward end of; stroke has moved across the path of the needle (see Fig. 4), and the looper thread running to the previous stitch is held well to; the opposite side of the needle path, from the position of the looper when retracted. The crank 42 on the end of the shaft 28 is; passing the slow dead center when the, looper is at the forward end of itsstroke andtherefore, said looper will be given a dwell at the forward end of its stroke. The first retracting movements of the lo oper are,comparatively slow so that the needle point passes the looper thread running from theeye of the looper to the previous stitchbefore the looper is retracted, but slightly. The looper however, is retracted sufficiently, for the needle to pass between the body thereof and the looper thread above referred to, by the time the- I tioned so that the non-thread carrying looper will move in the opposite direction from that ofthe thread carrying looper. The screw 44, which holds the crank arm 44: on the2 shaft l0 is loosenedand the arm turned half-over-and properly adjusted, so as to give the. correct timing for the movements of the non-thread carrying looper.

The slack in the looper thread is controlled by the thread cam wire 54, which is mountedupo ancollarv 55, secured to the looper shaft 33. This thread cam wire 54 moves between suitable thread guides 56 and 57 ,formed in the outer end of a thread wire 58,which issecured to the under side i of the work support by a screw 59.

I; do not claim herein broadly, the movements .of the, looper across the needle path 'tospread the looper thread as the same forms the subject matter ofmy application Serial No. 337,990,, filed October 8th, 19:06. The specific form of looper carrier and the looper thread controller are also disclosed in. a app ica Having thus describedmy invention, what I claim as new and desire to secure by Letters Patent, is

1. A sewing machine including in combination, a work support, a continuously rotating shaft mounted beneath said work support, a needle, a looper, a looper supporting shaft extending in substantially the same direction as said rotating shaft on which said looper is mounted, said rotating shaft and said looper supporting shaft being substantially in axial alinement, and means beneath the work support and intermediate said looper supporting shaft and said continuously rotating shaft for moving said looper forward into the needle loop, and laterally whereby said looper thread is positioned upon the opposite side of the needle, and for retracting said looper in the same path.

2. A sewing machine including in combination, an upper rotating shaft, a lower shaft continuously rotated from said upper shaft, a needle, a looper, a shaft for supporting said looper, and means for oscillating said looper supporting shaft from said continuously rotating shaft, and for moving the same longitudinally, said longitudinal and oscillating movements being timed to give said looper a forward movement into the needle loop, and a lateral movement to position the looper thread on the opposite side of the needle, and to retract said looper in the same path.

3. A sewing machine including in combination, a work support, a continuously ro' tating shaft mounted beneath the work support and terminating midway of said work support, a looper, a looper-supporting shaft extending in substantially the same direction as said rotating shaft on which the looper is mounted, said rotating shaft and said looper supporting shaft being substantially in axial alinement, means intermediate the rotating shaft and the looper-supporting shaft for oscillating said loopersupporting shaft, and means for moving said looper-supporting shaft longitudinally.

4. A sewing machine including in combination, a work support, a continuously rotating shaft mounted beneath the work support and terminating midway said work support, a looper, a looper supporting shaft on which the looper is mounted arranged substantially axially in line with said rotating shaft, and means intermediate said rotating shaft and said looper supporting shaft, for oscillating said looper supporting shaft, and means for moving said looper supporting shaft longitudinally.

5. A sewing machine, including in combination, a work support, a continuously rotating shaft mounted beneath said work support and terminating midway said work support, a looper, a looper support arranged substantially in line with said rotating shaft,

means intermediate said shaft and said looper support for oscillating the same, and a link pivoted to a stationary part of the machine and connected to said looper support for moving said support longitudinally.

6. A sewing machine, including in combination, a work support, a continuously rotating shaft mounted beneath said work support and terminating midway said work support, a looper, a looper support arranged with its longitudinal axis substantially in line with said rotating means, an auxiliary shaft substantially parallel with the rotating shaft, means for oscillating said auxiliary shaft from the rotating shaft, means for oscillating the looper support from said auxiliary shaft, and means for moving the looper support longitudinally as it is oscillated.

7 A sewing machine, including in combination, a work support, a continuously rotating shaft mounted beneath said work support and terminating midway said work support, a looper, a looper support arranged with its longitudinal axis substantially in line with said rotating shaft, an auxiliary shaft substantially parallel with the rotating shaft, a link connecting said rotating shaft to said auxiliary shaft for oscillating the same, and a link for connecting the auxiliary shaft to said looper support for oscillating the same, and means for moving the looper support longitudinally as it is oscillated.

8. A sewing machine, including in combination, a work support, a continuously rotating shaft mounted beneath said work support and terminating midway said work support, a looper, a looper support arranged substantially in line with said rotating shaft, an auxiliary shaft substantially parallel with the rotating shaft, a link connecting said rotating shaft to said auxiliary shaft for oscillating the same, a link for connecting the auxiliary shaft to said looper support, an arm secured to the end of said looper support, a link pivoted to a stationary part of the machine and connected to said arm.

9. A looper mechanism including in combination, a looper, a looper support, means connected to the looper support for oscillating the same, and a link independent of said oscillating means, said link being pivoted to a stationary part of the machine at one end and connected at the other end directly to said looper support, and operated by the oscillating movement of the looper support to impart longitudinal movement to said support.

10. A looper mechanism including in combination, a looper, a looper support, means connected with the looper support for oscillating the same, a link pivoted at one end to a stationary part of the machine, a collar carried by said looper support, and having an, outwardly projecting arm connected to the other end of said link, whereby said link is operated by the oscillating movement of the looper support to impart longitudinal movement to said support.

11. A looper mechanism including in combination, a looper, a looper support, means connected to the looper support for oscillating the same, a link independent of said oscillating means, said link being pivoted at one end to a stationary part of the ma chine and disposed so as to vibrate in a vertical plane substantially parallel with the axis of the looper support, the other end of said link being connected to said looper sup port and operated by the oscillating movement of the looper support to impart longitudinal movement to said support.

12. A looper mechanism including in combination, a work support, a looper, a looper support, a collar carried by one end thereof, an arm formed on said collar, a link pivoted to the underside of said work support and connected to said arm, and means for oscillating said looper support, said link operating when oscillated by the movements of the looper support to impart longitudinal movement to said looper support.

18. A looper mechanism including in combination, a work support, a looper, a looper support, a collar carried by one end thereof, an arm formed on said collar, a link pivoted to the underside of said work support and connected to said arm, an arm carried by the looper support, and means connected with said last named arm for oscillating the looper support, the said link operating when oscillated by the movements of the looper support to impart longitudinal movement to said looper support.

let. A looper mechanism for sewing machines, including in combination a looper, a looper support, a rotary shaft, an auxiliary shaft, means for imparting motion from said auxiliary shaft to said looper support, and means for oscillating said auxiliary shaft from said rotary shaft, comprising a crank arm and means for adjustably securing said crank arm to said rotary shaft and means for moving the looper support longitudinally.

15. A sewing machine including in com bination a work support, a continuously rotating shaft mounted beneath said work support, said rotating shaft having a crank at one of its ends, an auxiliary shaft parallel to. said rotating shaft,.said auxiliary shaft having a crank at one of its ends longer than the first named crank, said cranks having direct connection between them, whereby said rotatingshaft gives said auxiliary shaft an oscillatory movement, a looper sup port independent of said auxiliary shaft, and means for connecting said looper sup port to the auxiliary shaft.

16. A sewing machine including in combination, a work support, a looper carrier, a threaded looper mounted on said carrier, a rotary shaft, a rock shaft mounted on said work support, a link connecting said rotary shaft to said rock shaft, a link connecting said rock shaft to said looper carrier, and

means connected to said loopercarrier and operated through said rock shaft for. moving the looper laterally.

.17. A sewing machine including, in combination, a work support, a looper carrier,"a looper, mounted on said carrier, a rotary shaft, a rock shaft, a connection including a link between said rotary shaft and said rock shaft, a connection including a link between said rock shaft and said looper carrier, and an element pivoted to said looper carrier and to said work support whereby when said looper is oscillated the same is moved laterally.

18. In a sewing machine, the combination with a main shaft, of a needle bar carrying a needle, operative connections intermediate said needle bar and the main shaft, a looper rock shaft, a looper thereon cooperating with said needle in the production of stitches, 'a crank upon said looper rockshaft, an operative connection intermediate said crank and the main shaft for rocking said looper shaft, a second crank upon the LANSING ONDERDONK.

YVitnesses:

W ALTER HARTLEY,- FRANKLIN H. CHILTON.

Copies 01 this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

